torque converter

[stuga]

 What I would like is a good take off at the traffic light if I wanted to, but not so much that I compromise my regular driving and highway cruising.
73 charger,70 383 .20 over, purple cam 474 lift, installing a rebuilt 727 with part throttle upgrade,non lock-up Now running 276 open 8 3/4 but hoping to switch soon to 323 or 355 suregrip. rear tires are BF 275/60/r15.
Any idea's on a decent torque converter with out taking out a morgage. Been researching and can't even find out what the stall speed for a stock coverter was.

[daveco]

Regarding the stock stall speeds, for HP engines the stock stall was around 2350-2650rpm, low-po was around 1850-2100rpm. Just a gear swap will really wake it up.

[stuga]

 Thanks daveco. All the mopar books I have and the cartech books don't mention it.

[daveco]

 
Those numbers came from a 1969 factory service manual, I don't know how much they changed from year to year.

[Nacho-RT74]

the problem with the FSM is they doesn't state PN for them so you can't tell is maybe a /6 TC to 727 could be the same unit than a 440 4 bbl, just responding diff due the torque

just specify the factory mounted torque converter response ( whichever it is ) on each engine

[daveco]

the problem with the FSM is they doesn't state PN for them so you can't tell is maybe a /6 TC to 727 could be the same unit than a 440 4 bbl, just responding diff due the torque

just specify the factory mounted torque converter response ( whichever it is ) on each engine

Yes, the fsm is less than specific. It shows only two converter diameters, 10.75" (HEMI and 904) and 11.75" (non-HEMI 727) while the parts catalog lists four different P.N.s.
HP 440 & HD 225 w/727 do in fact use the same P.N. (2843586) which shows (as you noted) that the different stall speeds were due to engine torque characteristics.

[Nacho-RT74]

then you would need the parts catalog to compare LOL. If not, you can find what you think "UNWORTHLY" TC from a 225, and trash it, but its really some "worthly" TC for 440 LOL

and... more to say if we talk about a 383 4bbls being maybe the same than some other one LOL

[b5blue]

MP 145K = 1950-2100 stall. Pretty much what 69-70 HP had stock. Your ratio is what's bogging you down, go 3.23 or 3.55 first then research T.C., a lot improvements have been made from what I'm hearing.

[stuga]

 Thanks for all the help guy's. I got the same info about factory stall from my mechanic 1970 service manual today. I'm probably going to switch to a suregrip 355 rear since the 323 still aren't being reproduced yet. This will be the final upgrades and repairs to the car after her first cruise out last summer. Witch I'm still surprised on the out come of, we found a rear main seal leak(going to change when doing transmission), power steering leak (replaced with firm feel steering box) and the bad transmission shift from 2ND to 3 gear. All and all my son and I didn't build her to be a show car and we still won 3 first place trophy's last year and everyone liked her, so we figured we did something right for a amateur restoration and customization( don't think that's a word but what the hell, it fits).

[daveco]

Very nice looking Charger

[John_Kunkel]

I usually hate that color but on that car it looks great. 

[Brock Samson]

yeah, for a later model third, it's one of my Favs. Congrats on the wins!! 

[GunMetal]

Very nice job!

[firefighter3931]

Nice looking car 

With that cam and 383ci i would look at a performance 11in unit. The 474 will want some stall because it's a little on the large size for that displacement. The 3.55's and looser converter will really wake it up 

Mancini carries the 11in dynamic unit and it's well worth the cash. You get what you pay for when it comes to torque converters. 



Ron

[TUFCAT]

I totally agree!!!!  I'm going to run an 11-inch Dynamic from Mancini with nicely warmed over 383.  I also have 3:23 gears in my car.

You can't go wrong by spending your money on the best quality torque convertor available for your application. Consider the money spent building a sweet engine, but then going cheap on the TORQUE CONVERTOR.  It makes no sense.

Even if your dyno numbers are outstanding, your torque convertor makes all the difference in the world.  

[doctor4766]

Excuse my ignorance here but what exactly is "all the difference in the world"?
I had my 383 rebuilt by a friend last year and then swapped in a 3.23 8.75" diff not long after.
Sure it does go better now, but it won't just fry the tyres off the line unless I use the brakes and really give it to her.
Current TC is the standard one I believe. See pic below.
As far as the build went, it was mostly to freshen up the engine (after Mancini suplied the wrong camshafet that they haven't still addressed), not to be a race machine, but was done properly.
I run fresh 906 heads with standard valves and springs.
Shift kitted 727 that was rebuilt just before I bought my Charger in '06
Crane H272-2 cam
Double roller timing chain
750 V/S Holley on factory RR type cast manifold
HP exhaust manifolds
Windage tray
And these Sealed Power pistons




I've had people tell me I should fit a hi stall but they never really explain exactly "how" it will change the car's performance.

[Nacho-RT74]

I've had people tell me I should fit a hi stall but they never really explain exactly "how" it will change the car's performance.

with "full" engage at higher RPMs, more torque, better response

something like a full clutch pedal release at higher RPMs for a faster and easier response

[TUFCAT]

You'll feel it with your right foot!    In simplist terms, when you mash the pedal torque transfers to the rear tires faster!  

[daveco]

http://www.apsprecision.com/images/How%20Torque%20Converters%20Work.pdf

[stuga]

 First, Thank you guy's for all the complements.Yes we did add the rocker trim and antenna before going to the car shows My mechanic and good friend doesn't want to use the old torque converter in the new tranny even if we flush it for the fear of gunk and junk stuck to the inside due the the problems we found in the transmission last year.
Are you guy's talking about the dynamic 11" converter 2600-3200 stall part# DYN11741 on Mancini's web site?

[firefighter3931]

  Are you guy's talking about the dynamic 11" converter 2600-3200 stall part# DYN11741 on Mancini's web site?

Yep, That's the one 


Ron

[Paul G]

Stuga, I love the color of your Charger   ! You wont be dissapointed by following Rons advice believe me. I swapped out my TC last year. Used a 10" per Rons advice. I could not be happier.

[grdprx]

Is there a particular torque converter that is best?  I've researched, and the popular advise is you get what you pay for.  But I've seen many brands suggested.  Hughes, PTC, and Dynamic, B&M; TA's are 50/50, some like them, others not so much.  I'm wondering, because I see a new one in my future.

[doctor4766]

I've had people tell me I should fit a hi stall but they never really explain exactly "how" it will change the car's performance.

with "full" engage at higher RPMs, more torque, better response

something like a full clutch pedal release at higher RPMs for a faster and easier response

Thanks mate.
Looks like I'd better be looking into it.
But I won't be buying from Mancini whatever the case.